First it would not be coax. It would be twisted pair drop wire
If you have a proper test jack at the NID, you can see if your modem syncs up @ the test jack
Call 811 before you dig (General Service Announcement)
reply to danstar25
The "DigTess" or 811, should have been called prior to doing any digging in the yard. Essentially, now if your cable(s), or drop wires are damaged, either you, or your contractor, will be getting a bill for the repair.